Auxiliary Heater Blower Speeds
WARNING: This page is about a different car, the 2002 GMC Safari and 2002 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Auxiliary heat has a blower motor that is independent to that system. Voltage is supplied to the auxiliary heater switch from a relay in the underhood fuse block. The auxiliary heater blower motor switch applies voltage to the auxiliary blower motor control circuit that corresponds to the selected blower speed. The resistors and the blower motor are in a series circuit. The following list represents the number of resistors in series with the auxiliary blower motor per particular speed request:
- Low speed - (2) resistors.
- Medium speed - (1) resistor.